G’day. Thanks for that link.
Yes, I DID read that report, looked at the screenshots, etc. and towards the bottom of that page got well & truly lost.
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Please remember that I am just a CALC user without the extensive knowledge that you have. Sometimes things that are clear to you are way above my comprehension level. For me to get a concept from a bug report is somewhat difficult. 
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What I failed to grasp, therefore, was the relevance of a bug report referring to a picture being compressed was also the same problem for text-only in Comments.
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I was, however, interested in this:
Stéphane Guillou (stragu) 2024-01-10 22:58:45 UTC
The issue is related to the differently sized popup comment, likely since the fix for bug 73537. The popup comment is resized to fit the authorship information, which really becomes a problem when the comment is filled with a stretched picture, like here. If the image wasn’t stretched, but for example centred or tiled, the aspect ratio issue would be less of a problem (but the placement of the image would change, potentially crop it…). Confirming in: Version: 24.8.0.0.alpha0+ (X86_64) / LibreOffice Community Build ID: a2ccc25ccb2e94f5990d6d413541dbcdd3a72338 CPU threads: 8; OS: Linux 5.15; UI render: default; VCL: gtk3 Locale: en-AU (en_AU.UTF-8); UI: en-US Calc: threaded
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“The popup comment is resized to fit the authorship information, which really becomes a problem when the comment is filled with a stretched picture, like here.”
Again, these references are all to pictures and, again, I didn’t see the relevance.
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I was wondering if this reference to ‘Authorship’ is something Ludd referred to. I tried to explain then that I didn’t see the need for going into Authorship as I was the only one working on my own spreadsheets.
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Does this mean I therefore have to mess around with the Authorship thing, just to get the Comments to format correctly?
I wasn’t expecting that - something I haven’t experienced before.
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Also, thanks for clarifying the bug report I found wasn’ the same as my problem.
Thanks & regards
Ian